US4473695A
Expired / Lapsed
US
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Synthesis of N,N'-dialkyl-4'bipyridinium reagents
Assignee: Massachusetts Institute of Technology
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Filing: 1981-07-14
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Granted: 1984-09-25
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Expires: 2001-07-14
Abstract
Abstract A novel class of dialkyl and dialkyl-aromatic viologens (4,4'dipyridinium compounds) and their salts which may be polymerized and covalently bonded to electrodes for use in electronic display systems.
Inventors
- 👤 Mark S. Wrighton
- 👤 Dana C. Bookbinder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:21
CPC Classifications
C; C07; C07F; C07F5/00; C07F5/02; C07F5/025; C07F7/00; C07F7/02; C07F7/08; C07F7/12; C07F7/121; C07F7/127; C07F7/18; C07F7/1804; G; G02; G02F; G02F1/00; G02F1/01; G02F1/15; G02F1/1514; G02F1/1516; G02F1/15165; G02F1/1503
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
61 words
A compound having the formula: ##STR4## where R is an alkyl group having one to ten carbon atoms or an alkyl-aromatic group having one to ten carbon atoms in an alkyl chain and two or less rings; and where R' is a covalent binding agent choosen from the following group: lower silicon alkoxides, silicon halogens, lower boron alkoxides, or boron halogens.
Claim 2
Dependent Claim
61 words
A compound having the formula: ##STR4## where R is an alkyl group having one to ten carbon atoms or an alkyl-aromatic group having one to ten carbon atoms in an alkyl chain and two or less rings; and where R' is a covalent binding agent choosen from the following group: lower silicon alkoxides, silicon halogens, lower boron alkoxides, or boron halogens.
Claim 3
Dependent Claim
17 words
The compound of claim 1 wherein R is an alkyl group having 3 or less carbon atoms.
Claim 4
Dependent Claim
11 words
The compound of claim 1 wherein R is an alkyl-benzene group.
Claim 5
Dependent Claim
17 words
The compound of claim 1 where R' is a silicon alkoxide having one to ten carbon atoms.
Claim 6
Dependent Claim
10 words
The compound of claim 1 wherein R' is silicon chloride.
Claim 7
Dependent Claim
10 words
The compound of claim 1 wherein R' is boron dichloride.
Claim 8
Dependent Claim
7 words
An ionic material having the formula: ##STR5##
Claim 9
Dependent Claim
7 words
An ionic material having the formula: ##STR5##
Claim 10
Dependent Claim
68 words
A salt having the formula: ##STR6## where R is an alkyl group having one to ten carbon atoms or an alkyl-aromatic group having one to ten carbon atoms in an alkyl chain and two or less rings; where R' is a binding agent choosen from the following group: silicon alkoxides, silicon halogens, boron alkoxides or boron halogens. and X is a halogen or other anion for charge balance.
Claim 11
Dependent Claim
68 words
A salt having the formula: ##STR6## where R is an alkyl group having one to ten carbon atoms or an alkyl-aromatic group having one to ten carbon atoms in an alkyl chain and two or less rings; where R' is a binding agent choosen from the following group: silicon alkoxides, silicon halogens, boron alkoxides or boron halogens. and X is a halogen or other anion for charge balance.
Claim 12
Dependent Claim
17 words
The salt of claim 8 wherein R is an alkyl group having 3 or less carbon atoms.
Claim 13
Dependent Claim
11 words
The salt of claim 8 wherein R' is a silicon alkoxide.
Claim 14
Dependent Claim
10 words
The salt of claim 8 wherein X is a bromide.
Claim 15
Dependent Claim
10 words
The salt of claim 8 wherein X is a chloride.
Claim 16
Dependent Claim
6 words
A salt having the formula: ##STR7##
Claim 17
Dependent Claim
6 words
A salt having the formula: ##STR7##
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-09-25 | 1988-03-26 | 1988-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-25 | 1992-03-26 | 1992-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-25 | 1996-03-26 | 1996-09-25 | $7700.00 | Window Closed / Lapsed |